that's any half-decent fabrication shop!
and they're EXPESNIVE to get resurfaced if you wear them down!!!!!
we use granite because it doesnt tend to warp or change shape much (HOPEFULLY)!!!
but those things are FLAT to within just a few millionths of an inch per foot, usually.
but also its funny that it doesnt matter if the object is a 2 inch plate or a 10 foot frame. all will be judged by the slab.
the head from your shitty lawn mower that you just decked by eye on the shittiest mill with a pretty dull fly cutter????
TO. THE. SLAB.
If you'd like to know more about taking care of the your very expensive surface plate SLAB that every machine shop needs, here's Adam Booth:


